Effects of N and P Additions On Soil Nutrient and Biochemical Characteristics in An Acacia Mangium Stand

Rapid development of industry in the world results in increase of nitrogen deposition and phosphorus fertilizer application. With an Acacia mangium stand as study object, the authors studied soil characteristics after N and P addition treatments in Yunyong forest farm of Guangdong province, in order to provide reference for soil management of Acacia stands. The results showed that N addition treatment significantly increased contents of soil organic matter, total N, available N and available P; P and N+P addition treatments significantly increased contents of soil organic matter, total N, available N, available P and available K. The three treatments had not significantly increased total K content, but significantly increased the activities of soil urease, acid phosphatase and catalase.